Rotary engine



(ModeL) J. 8; M. GILLESPIE.

ROTARY ENGINE.

No. 268,659. I Patented Dec. 5, 1882.

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UNIT D STATES PATENT OFFICE.

JAMES GILLESPIE AND MARTIN GILLESPIE, OF WES'IPOINT, OHIO.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 268,659, dated December 5, 1882. Application filed September 26, 1882. (Model) To all whom it may concern:

Be it known that we, JAMES GILLESPIE and MARTIN GILLESPIE, of West Point, in the county of Oolumbiana and State of Ohio, have invented a new and Improved Rotary Engine,

of which the following is a full, clear, and exact description.

This invention relates to the class of rotary engines provided with radially-moving gates to or pistons; and it consists in the combination and arrangement of parts, substantially as hereinafter more fully set forth.

Reference is to be had to the accompanying drawings forming a part of this specification,

1 in which similar letters of reference indicate corresponding parts in both the figures.

' Figure l is a side elevation of ourimproved enginewith the face-plate removed and partly sectional. Fig. 2 is a transverse section on line w m, Fig. 1.

A is the case or cylinder of the engine, pro vided with movable face-plates B B, which are formed with boxes for the shaft 0, which passes transversely through the cylinder. The

2 central portion of the cylinder is removed to form the steamway, which is circular above the two points 1 l at opposite sides, the center of the circle being at the shaft 0; but below the two points 1 l the steamway is flattened or drawn inward eccentric to the shaft. In

the bottom of the cylinder, and communicating with the steamway, are twoports, b b, for supplying steam; and at the lower end of these ports is fitted a rocking valve, 0, which 5 is slotted for admitting steam to either port, according to the position of the valve, and

thereby turning the engine in one direction or the other.

Upon the shaft 0 is a wheel, D, fitted with sliding gates E, which may be two or more in number. These gates are fitted in grooves d in the wheel D, and are formed at their outer ends with T-fianges c, which, when the gates are moved inward, fit snugly in a recess formed 5 for them in the face of the wheel. At the each side of the wheel D, and attached to the wheel for rotation therewith. These plates are formed with grooves t, for receiving "the edges of the sliding gates, so as to guide them in their movement and retain them in place when projected outward. k is an exhaust-port at the upper part of the cylinder. of the wheel D is such. that its under side moves in contact with the bottom of the steamway, and the enlargement of the steamway at the upper side of the wheel is sufficient to allow the extreme movement required for the gates.

In operation, steam being admitted by one of the ports 12, the gate E, in advance of the port, is forced outward by the steam entering the groove f beneath the flange of the gate, so that the gate forms an abutinenti or receiving the steam-pressure, and the wheel is carried around. The gate reaches its extreme outward movement at the point 1, and remains in that position from that point to the exhaustport, where the steam is exhausted, and the pressure being at that moment taken by the other gate, the first one is moved readily inward by the eccentric surface of the steantway until it reaches the under side of the wheel, in

position for again receiving steam. In this manner a continuous rotation is obtained, and the parts being retained in position by the steam-pressure, no springs or other devices that are liable to get out of order are required.

Having thus described our invention, we claim as new, and desire to secure by Letters Patent- In a rotary engine, the. combination, with JAMES GILLESPIE. MARTIN GILLESPIE.

Witnesses:

J AMES HENDERSON, WM. J. JORDAN.

The diameter 

